Patent · US Expired

Device to detect pressure in an x-ray tube

US6961407B2 · kind B2 · utility

2Cited by

5References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Josef Deuringer · Herzogenaurach, DE
Jörg Freudenberger · Eckental, DE
Peter Schardt · Simmerath, DE
Markus Schild · Herzogenaurach, DE

Key dates

Filing date	Mar 31, 2004
Grant date	Nov 1, 2005
Priority date	—
Expiry date	Apr 6, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH01J35/02
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a method to detect the pressure in an x-ray tube having a cathode of the x-ray tube that is heated with a heater current, and wherein electrons are accelerated between the cathode and an anode by an applied x-ray tube voltage, the heater current is measured, a tube current corresponding to the tube -ray voltage is measured, the difference between the measured heater current and the measured tube current is determined or the temporal change of the measured heater current or of the measured tube current is determined, the difference or the temporal change is compared with predetermined calibration values, and a value representing the pressure in the x-ray tube is determined from the comparison.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.